What are you most proud of?This is the first piping I've done and it didn't turn our horribly!

What advice would you give someone starting this project?The instructions say to leave part of a side seam open to turn the jumper. I was thinking leaving the hem open would work just as well, but it didn't. When I make it again, I'll so what the directions say.
Also, if you've never done piping before, don't start on something with curves.